current bounds on the number of colors: 0 -- 47 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:55 2012 Optimize a model with 12651 rows, 1629 columns and 38893 nonzeros Presolve time: 0.05s Presolved: 12651 rows, 1629 columns, 38893 nonzeros Variable types: 0 continuous, 1629 integer (1629 binary) Root relaxation: objective 0.000000e+00, 115 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (408 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 23 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:55 2012 Optimize a model with 6075 rows, 1065 columns and 18601 nonzeros Presolve time: 0.02s Presolved: 6075 rows, 1065 columns, 18601 nonzeros Variable types: 0 continuous, 1065 integer (1065 binary) Root relaxation: objective 0.000000e+00, 97 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1026 simplex iterations) in 0.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:56 2012 Optimize a model with 2787 rows, 783 columns and 8455 nonzeros Presolve time: 0.01s Presolved: 2787 rows, 783 columns, 8455 nonzeros Variable types: 0 continuous, 783 integer (783 binary) Root relaxation: objective 0.000000e+00, 95 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 72 - 0.00000 - - 0s 0 0 0.00000 0 64 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2336 simplex iterations) in 0.25 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 5 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:56 2012 Optimize a model with 4431 rows, 924 columns and 13528 nonzeros Presolve time: 0.01s Presolved: 4431 rows, 924 columns, 13528 nonzeros Variable types: 0 continuous, 924 integer (924 binary) Root relaxation: objective 0.000000e+00, 94 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 92 - 0.00000 - - 0s 0 0 0.00000 0 28 - 0.00000 - - 0s 0 0 0.00000 0 177 - 0.00000 - - 0s 0 0 0.00000 0 229 - 0.00000 - - 0s 0 0 0.00000 0 130 - 0.00000 - - 1s 0 0 0.00000 0 140 - 0.00000 - - 1s 0 0 0.00000 0 203 - 0.00000 - - 2s 0 0 0.00000 0 127 - 0.00000 - - 2s 0 0 0.00000 0 172 - 0.00000 - - 3s 0 0 0.00000 0 172 - 0.00000 - - 3s 0 2 0.00000 0 172 - 0.00000 - - 4s Cutting planes: Clique: 41 Zero half: 2 Explored 19 nodes (29606 simplex iterations) in 4.56 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 8 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:07:01 2012 Optimize a model with 4979 rows, 971 columns and 15219 nonzeros Presolve time: 0.01s Presolved: 4979 rows, 971 columns, 15219 nonzeros Variable types: 0 continuous, 971 integer (971 binary) Root relaxation: objective 0.000000e+00, 112 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 50 - 0.00000 - - 0s 0 0 0.00000 0 31 - 0.00000 - - 0s 0 0 0.00000 0 185 - 0.00000 - - 0s 0 0 0.00000 0 201 - 0.00000 - - 0s 0 0 0.00000 0 122 - 0.00000 - - 1s 0 0 0.00000 0 120 - 0.00000 - - 1s 0 0 0.00000 0 144 - 0.00000 - - 2s 0 0 0.00000 0 145 - 0.00000 - - 2s 0 0 0.00000 0 160 - 0.00000 - - 2s 0 0 0.00000 0 160 - 0.00000 - - 3s 0 2 0.00000 0 160 - 0.00000 - - 3s 370 12 infeasible 15 - 0.00000 - 73.0 5s 608 23 0.00000 0 112 - 0.00000 - 72.5 10s 877 10 0.00000 21 122 - 0.00000 - 106 15s * 1553 1 29 0.0000000 0.00000 0.0% 104 19s Cutting planes: Clique: 15 Zero half: 7 Explored 1554 nodes (184397 simplex iterations) in 19.56 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% optimal solution found: number of colors: 9